Acquisition of a Laser Diffraction Particle Size Analyzer for Research in Sedimentology and Biogeochemistry

购买激光衍射粒度分析仪用于沉积学和生物地球化学研究

• 批准号: 0733234
• 负责人: Elana Leithold
• 金额: $ 6.26万
• 依托单位: North Carolina State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-08-01 至 2008-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0733234&HistoricalAwards=false
• 关键词: Acquisition; Laser; Diffraction; Particle; Size

This grant provides support for the acquisition of a laser diffraction particle size analyzer for the Department of Marine, Earth, and Atmospheric Sciences (MEAS) at North Carolina State University. A Beckman Coulter laser diffractometer with the capability for rapid and repeatable determination of grain size distributions in suspensions of sand to clay sized fractions will be acquired. A group of five PIs and their students will use the laser diffractometer for grain size analysis in support of a range of research in sedimentology, carbon cycling, marine stratigraphy, animal-sediment interactions, hydrology and geochemistry. Marine and lacustrine sediments and soils provide a record of past environmental conditions, are important reservoirs in the global carbon cycle, and host a great variety of life forms from bacteria to macrofauna, whose biogeochemical activity controls the fate and transport of naturally occurring and anthropogenic organic and inorganic species. Grain size distributions can reveal a great deal about transport processes and when coupled with other geochemical proxies, provide insight to provenance, paleoenvironmental conditions and diagenetic processes. The laser diffractometer will support improved educational opportunities for undergraduate and graduate students at NCSU. Faculty and student biogeochemical and paleoenvironmental research at NCSU has implications for understanding and reacting to global climate change and for pollutant remediation.

该补助金为北卡罗来纳州州立大学海洋、地球和大气科学系（MEAS）购买激光衍射粒度分析仪提供支持。 将获得一台Beckman Coulter激光衍射仪，该仪器能够快速、可重复地测定砂至粘土粒度级悬浮液中的粒度分布。一个由五名PI和他们的学生组成的小组将使用激光衍射仪进行粒度分析，以支持沉积学、碳循环、海洋地层学、动物-沉积物相互作用、水文学和地球化学等一系列研究。 海洋和湖泊沉积物和土壤记录了过去的环境条件，是全球碳循环的重要储存库，并承载着从细菌到大型动物的各种生命形式，其生物地球化学活动控制着自然存在和人为有机和无机物种的命运和迁移。 粒度分布可以揭示大量的搬运过程，并与其他地球化学指标相结合，提供洞察物源，古环境条件和成岩过程。激光衍射仪将支持NCSU的本科生和研究生改善教育机会。 NCSU的教师和学生地球化学和古环境研究对理解和应对全球气候变化以及污染物修复具有重要意义。